std::is_pointer 定义于头文件<type_traits> template<classT> structis_pointer; (C++11 起) 检查T是否为指向对象指针或指向函数指针(但不是指向成员/成员函数指针)。若T是对象/函数指针类型,则提供等于true的成员常量value。否则,value等于false。 添加is_pointer或is_pointer_v(
std::bit_and std::bit_or std::bit_xor std::bit_not std::boyer_moore_horspool_searcher std::unary_function std::binary_function std::ptr_fun std::pointer_to_unary_function std::pointer_to_binary_function std::mem_fun_t, std::mem_fun1_t, std::const_mem_fun_t, std::const_mem_...
// static_pointer_cast example #include <iostream> #include <memory> struct A { static const char* static_type; const char* dynamic_type; A() { std::cout << "construct A " << std::endl; dynamic_type = static_type; } }; struct B: A { static const char* static_type; B() {...
std::pointer_to_binary_function函数对象,充当二进制函数的包装器。 成员函数 (constructor) constructs a new pointer_to_binary_function object with the supplied function (public member function) operator() calls the stored function (public member function) STD::指针[医]到[医]二进制[医]功能:指针[医...
operators (std::unique_ptr) operators (std::variant) Program support utilities setjmp SIGABRT SIGFPE SIGILL SIGINT SIGSEGV SIGTERM SIG_DFL SIG_ERR SIG_IGN std::abort std::addressof std::add_const std::add_cv std::add_lvalue_reference std::add_pointer std::add_rvalue_reference std::add_...
std::pointer_safety std::pointer_to_binary_function std::pointer_to_unary_function std::pointer_traits std::ptrdiff_t std::ptr_fun std::quick_exit std::raise std::range_error std::rank std::rbegin(std::initializer_list) std::realloc std::ref std::reference_wrapper std::reference_wrappe...
#include <type_traits>intmain(){structA{intm;voidf(){}};intA::*mem_data_ptr=&A::m;// a pointer to member datavoid(A::*mem_fun_ptr)()=&A::f;// a pointer to member functionstatic_assert(!std::is_pointer<A>::value&&!std::is_pointer_v<A>// same thing as above, but in...
std::pointer_to_unary_function From cppreference.com <cpp |utility |functional Function objects template< classArg, classResult >classpointer_to_unary_function:publicstd::unary_function<Arg, Result>; (deprecated in C++11) (removed in C++17) ...
pointer_safety::relaxed All pointers are considered valid and may be dereferenced or deallocated. See also get_pointer_safety (C++11)(removed in C++23) returns the current pointer safety model (function) Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/memory/gc/poi...
代码中希望使用std::move提高效率,想探究std::move(*pointer)的用法是否合理? 分析# 这个问题不可一概而论,因为pointer所指对象的类型会影响结果。 整数# #include <iostream> int main() { int* p(new int(22));// a dumb pointer int b(std::move(*p)); std::cout<<" b = "<<b<<std::endl...